Machine for laying a knot



fiufiy 3H3, 1%35. F. GQLDBERGER MACHINE FOR LAYING A KNOT 2 Sheets-Sheet 1 Filed Feb. 7. 1954 5% 00 aw M $1133; 4%, E35. F. GOLDBERGER 2,009,491

MACHENE FOR LAYING A KNOT 7 Filed Feb. 7. 1934 2 Sheets- Sheei 2 Patented July 30, 1935 UNITED STATES;

MACHINE FOR LAYING A KNOT Franz Goldberger, Breda, Netherlands, assignor of one-half to Gerardus Hermanus Groot, Arnsterdain, Netherlands Application February '7, 1934, Serial No. 710,190

1 Claim.

It is already known to mechanically knot together two or more strings by means of a knotting beak. In the prior machines a knot is made occupying a fixed position relatively to the strings.

In contra-distinction herewith the invention has for its object to mechanically lay a knot in the one string of two strings of a doubled-over string, which knot is slidable over the other string, whereby the manual laying'of such a socalled sliding knot, which up to the present was necessary, is avoided. v

A knot of this kind whereby a sliding sling is formed is very useful in various applications amongst which as examples may be mentioned the mechanical provision of a sliding sling in markingor pricecards adapted to be attached to articles, e. g. in the art of ready made clothes, the rapidly tying up of uniform small packages, the tying up of individual bags of tea, etc; In

' all these examples the hitherto known, mechanically made but non-slidable knot cannot be used.

The machine for mechanically making a sliding knot according to the invention comprises a rotatable and axially movable knotting beak device at the one side of which a holder is located for holding the merging ends of the strings of a doubled-over string while at the other side of the knotting beak device two string guides are arranged so as'to keep at this point the strings at such distance from each other, that after the pulling of the strings towards one another by an axial movement of the knotting beak device during the subsequent rotation of this device one of the strings only can be gripped by the latter.

The invention will be more fully described with reference to the accompanying drawings illustrating the various phases of operation of the machine as well as one embodiment thereof.

Figs. 1-6 are schematical views of six successive operations performed by the machine.

Fig. 7 illustrates a knot made by the machine.

Fig. 8 is a front elevation, partly a section, of an embodiment of the machine.

Fig. 9 is a section on the line IXIX in Fig. 8.

Fig. 10 is a section on the line XX in Fig. 8.

Fig. 11 is a section on the line XI-XI in Fig. 8.

In Fig. 1 the knotting beak device I is shown in the position in which the beak 2 is directed rearwardly. At the left of the knotting beak device I a holder 3 is located over which a string is passed which is further guided by two string guides 4 and 5, mounted at the right of the knotting beak device, so that a doubled-over string is obtained, consisting of the strings 6 and I. In

the beak 2 is opened and thestring guide 5 is lowered so that on a further rotation of the knotting beak device l in the same direction through the string 1 only is engaged by the beak 2 and is cut through during the subsequent closing of the beak, the end of the cut string in i which the knot is to be laid being held fast by the meanwhile closed beak 2.

Finally, after the knotting beak device I has reached the position of Fig. 5, the string loop around the beak 2 is Withdrawn from the beak due to the displacement of the holder 3 (Fig. 6) to the left, the string end held by the beak 2 being then pulled through the loop so that finally a knot according to Fig. 7 is obtained. 2o

Figs. 8-ll schematically illustrate an embodiment' of the machine adapted to perform the above described operations.

In the box shaped machine frame 8 the main driving shaft 9 is rotatably supported. To the shaft 9 grooved pulleys 10, H and I2 are secured which serve to actuate the movable parts of the mechanism. Adjacent the grooved pulleys the guides l3, l4 and 15 respectively are mounted, which guides are rigidly attached to the machine frame 8.

The guide It serves to guide the slide l5 during rectilinear vertically reciprocating movement, said slide carrying a projection I1 engaging a groove IS in the pulley I9. 40

The upper end of the slide 16 is connected to the arm 20 by a connecting link l9, said arm 20 being attached to the oneend of the shaft 2!, rotatably supported by the machine frame 8, to the other end of which shaft the arm 22 is attached, which at its free end is provided with a finger 23. The groove l8 in the pulley M has such a shape that the arm 22v together with the finger 23 is movable between the positions indicated in Fig. 1 in full and in dotted lines. 50

The guide l4 serves to guide the slide49, during its vertically reciprocating movement, which slide carries a projection 24 that is in engagement with the groove '25 in the pulley II. The upper end of the slide 49 is connected to the slide 28 5.5

by means at a connecting link is, the latter slide 28 being gnided ina slot 21 in the machine frame 8 and provided with two forwardly projecting arms 29 between which the knotting beak device 30 is mounted for rotation. The outer shell of the knotting beak device located between said arms 29 is at the exterior provided with a toothed rim 3| extending throughout the entire length of the shell. The purpose of said rim will be explained hereinafter. Within the shell, provided with said exterior toothed rim 3!, the actuating means (not shown and described for instance in the German Patent No. 132,181 to Howard Darling Colman) for the opening and closing of the jaws of the beak 32 are arranged. The groove 25 in the pulley H has such a shape that at a full revolution of the pulley I I the knotting beak device 30 performs the reciprocating movement required for the laying of a knot and the subsequent returning to its initial position.

The guide [5 serves to guide the slide 33 during its rectilinear vertically reciprocating movement, which slide carries a projection 34 that is in engagement with the groove 35 in the pulley [2.

The upper end of the slide 33 is connected by the connecting link 36 to an arm 3? which is attached to the one end of a shaft 39 supported by a bearing 38 on the machine frame 8; to the other end of said shaft a gear sector 46' is secured. The teeth of the gear sector 40 are in engagement with the toothed rim 3| on the outer shell of the knotting beak device 30. The groove 35 in the pulley I2 has such a shape that at a full revolution of the pulley l2 the knotting beak device performs the rotation required for the laying-pf a knot and the subsequent returning to its initial position. 7

{The machine is further provided with a bobbin 'hglderi-nrgtshown) Supporting the string bobbin 4|, trom the string 42 is guided over the stringguides 43, 44, 45, a gripping mechanism 46 serving tovheldthe string end.

When moving the arm 22 from the full line position to the dotted position the finger 23 will come into contactrwith thestring portion between the string guides and 45 and will unwind such a length of string from the bobbin 4| that when the arm 22 has reached the dotted position the string occupies the position shown in dotted lines.

In the string tensioned in this manner a sliding knot is laid in the string portion denoted by 48 and over the string portion denoted by 47 in the manner described above with reference to Figs. .1-6. To this end the knotting beak device 30 is first lowered, then turned a quarter of a revolution and thereupon moved upwardly to such an extent that the string 48 with the portion bearing on the beak 32 is aligned with the string 41. Thereupon in the further rotation of the knotting beak device the string 48 is gripped between the opened beak 32, cut through and the knot is made which is then withdrawn from the meanwhile closed beak 32 due to the continued movement to the left of the arm 22.

The sliding sling thus formed is now pushed off the finger 23 whereafter the arm 22 is returned to the full line position and the string 42 is further unwound from the bobbin and clamped thereafter by the gripping mechanism 48 which has first been opened and then closed. In this condition the machine is ready for making the next knot.

It will be clear from the foregoing that the machine according to the embodiment shown delivers repeatedly a length of string having a sliding sling at one end.

I claim:

A machine for laying a knot in one of the strings of a doubled-over string said knot being slidable over the other string, comprising a rotatable and axially movable knotting beak device at the one side of which a holder is located for holding the merging string ends of the doubled-over strings, while at. the other side of the knotting beak device two string guides are arranged adapted to keep at'this point the strings at such a distance from each other that after the pulling of the strings towards one another by an axial movement of the knotting beak device one of the strings only can be gripped by the knotting beak during the subsequent rotation thereof.

FRANZ GOLDBERGER. 

